Photographic developing-tray



(No Model.)

W. I. BOOD'. PHOTOGRAPHIG DEVELOPING TRAY.

No. 546,347. Patented Sept. 17; 1895.

UNITED STATES PATENT OFFICE.

WILLIAM I. ROOD, OF SPENCER, IOWA.

PHOTO-GRAPHIC DEVELOPING-TRAY.

SPECIFICATION forming part of Letters Patent No. 546,347, datedSeptember 1'7, 1895. Application filed December 29, 1894. Serial No.533,340. (No model.)

To all whom/it may concern.-

Be it known that I, WILLIAM I. Roon,a citizen of the United States,residing at Spencer, in the county of Clay and State of Iowa, haveinvented a new and useful Photographic Developing-Tray, of which thefollowing is a specification.

This invention relates to photographic developing-trays for developingphotographic negatives; and it has for its object to provide a new anduseful tray of this character pro viding simple and efficient meanswhereby the exposed plate or film can be positively and uniformlydeveloped without handling with the fingers.

To this end the main and primary object of the present invention is toprovide a new and useful construction of developing-tray, in connectionwith a holder .or lifter for the plate or film, that will obviate thenecessity of placing the fingers in the developing chemical or thehandling of the plate or film during the operation of developing,thereby absolutely insuring the plate or film against being scratched orotherwise injured.

WVith these and other objects in view, which will readily appear as thenature of the invention is better understood, the same consists in thenovel construction, combination, and arrangement of parts hereinaftermore fully described, illustrated, and claimed.

In the drawings, Figure lis a perspective of a photographicdeveloping-tray constructed in accordance with this invention. Fig. 2 isa transverse sectional view. Fig. 3 is a detail in perspective of theholder-frame for the plate or film. Fig. 4 is a plan View of the pan ordish.

Referring to the accompanying drawings, 1 designates a rectangular panor dish that is made of any suitable material capable of withstandingthe action of the chemicals used in photographic developing, and saidpan or dish may be made in any desired size, according to the size ofplates or films designed to be developed therein. In the presentinvention the bottom 2 of the pan or dish 1 is provided at the innersides and ends of the pan or dish with a continuous rectangularcountersink or recess 3, that extends parallel with the sides and endsof the pan or dish and is sunk or depressed below the plane of the mainportion of the bottom 2. The said continuous rectangular countersink orrecess 3 is designed to receive therein the sides and ends of therectangular skeleton holder-frame 4.

The rectangular skeleton holder-frame 4 essentially consists of theconnected side and end plates 6 and is preferably stamped out -of asingle blank of metal. By reason of the skeleton construction of theholder-frame 4. the sides and ends of said frame surround an open spaceof a size agreeing with the main bottom 2, encircled by the countersinkor recess 3, and the said opening or opening-space of the rectangularholder-frame enables the operator to examine the plate or film bytransmitted light during the process of developing, as will be readilyunderstood by those skilled in the art.

The rectangular skeleton holder-frame 4 is provided at its outer edgewith a continuous upturned retaining-flange 7, that serves to firmlyretain the plate or film within the holder-frame while being lifted inor out of the pan or dish, and said frame 4: is further provided at oneside and at one end with a right-angularly and upwardly disposed armextension 8, provided at its upper end above the, top of the pan or dishwith a circular bead 9, that forms a socket to receive a handle 10, andby reason of the location of a handle at one side and one end of theplate-holder frame and the right angular disposition of the handles itwill be obvious that the said holder-frame can be easily lifted in andout of the pan or dish and can be conveniently manipulated by theoperator for examining the plate or film by transmitted light, as isusual in the process of development.

In using the developing-tray the exposed plate or film is placed withinthe holder-frame 4:, which is then lowered into the pan ordish 1, andwhen the holder-frame with the plate or film therein is placed in thepan or dish the side and end plates comprising the holderframe willregister in the continuous rectangular countersink or recess 3, and willtherefore lie flush with the main portion of the bottom of the pan ordish, so that no more solution or chemical is required in developing theplate or film, by reason of the use of the holder-frame, than would berequired if such holder-frame were not employed.

The many advantages of the herein described developing-tray will readilysuggest themselves to those skilled in the art, and it Will beunderstood that changes in the form, proportion, and the minor detailsof construction may be resorted to without departing from the principleor sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed, and desired to besecured by Letters Patent, is-

1. In a photographic developing apparatus, the combination of a pan ordish, the bottom of which is provided at the inner sides and ends with acontinuous rectangular countersink or recess, and a holder frame adaptedto removably fit Within the pan or dish and having its sides and endsregistering in said countersink or recess, substantially as set forth.

2. In a photographic developing apparatus, the combination of a pan ordish, the bottom of which is provided at the inner sides and ends with acontinuous countersink or recess, and a flanged rectangular holder frameprovided at one side and at one end with a handle and adapted to havethe side and the end portions thereof register in the counter sink orrecess of the pan or dish, substantially as set forth.

8. A plate or film holder for photographic developing purposes, the sameconsisting of a rectangular skeleton frame provided at its outer edgewith a continuous upturned retaining flange, and at one side and one endwith integral upwardly disposed arm extensions terminating at theirupper ends in circular beads forming sockets, and right angu' larlydisposed handles fitted in the sockets formed at the upper ends of saidarm extensions, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto al'fixedmy signature in the presence of two Witnesses.

WILLIAM I. ROOT).

Witnesses:

W. I. BOWMAN, A. L. Terran.

